Persistent Constrictor 22 (Commander: Duskmourn: House of Horror)

At the beginning of each opponent's upkeep, they lose 1 life and you put a -1/-1 counter on up to one target creature they control. Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

NM - $21.46
LP - $17.17
MP - $12.26
HP - $8.18
DMG - $4.09